Strip-guide for elastic fabrics.



} PATENTED SEPT. 17, 190?, A. H. DE V03. STRIP GUIDE FOR ELASTICFABRICS.

APPLICATION FILED APR.4, 1906.

3 SHEETS-SHEET l.

PATENTED SEPT. 17, 1907..

I A. H. DE VOE. ,STRIP GUIDE BOB ELASTIC FABRICS.

APPLIOATIQN FILED APB..4.1906.

3 SHBETSSHBET 2.

UNITED STATES PATENT ori niin ALBERT HARRISON DE VOE, OF ELIZABETH, NEWJERSEY, ASSIGNOR TO THE SINGER MANUFACTURING COMPANY, A CORPORATION OFNEW JERSEY.

r Specification of Letters Patent.

Patented Sept. 17, 1907.

Application filed April 4, 1906. Serial No- 809,748.

To all whom it may concern Be it known that I, ALBERT HARRISON DE Von, acitizen of the United States, residing at Elizabeth, in

the county of Union and State of New Jersey, have invented certain newand useful Improvements inStrip Guides for Elastic Fabrics, of which thefollowing is a Y specification, reference being had therein to theaccompanying drawings. 7 V

This invention relates to improvements in sewing machine foldingdevices, and it has for its object to provide means whereby the edges ofstrips of knit goods maybe controlled for proper introduction into suchedge-turning devices.

In'its preferred form, the present improvement comfmaterial relativelyconvex and concave members or edges of' the strip previously acted uponby the un curler. While the trip of knitted goods used in binding theraw edges of certain portions of articles of underwear formed of likematerial is usually wound upon spools or reels which are mounted upon oradjacent to the sewing machine by which it is applied to the garment, itis in practice impracticable to place such reel sufficiently close tothe edge turning guide or binder to prevent the curling .ofits edges,but by'the employment of the present improvement in connection with suchguide, the curled edges of the strip are so treated as to insure theirproper introduction into the edgeturning device bywhich the strip ispresented to the. stitch-forming mechanism in the desired relation tothe garment. w

In the accompanying drawings, Figure l is a side elevation of theforward portion of a sewing machine provided with the presentimprovement, and Fig. 2 a plan of the same. Fig. 3 is a perspectiveview, and Fig. 4 a front end view of a binding guide embodying theimprovement. Fig. 5 is a sectional elevation of the baseplatc'of theattachment. Fig. 6 is a perspective view, and Fig. 7 a rear end view ofthe binding guide in a somewhat simplified form.

The attachment is represented in Figs. 1 and 2 as applied to a Singerdouble-chain-stitch machine having the bed 1 and overhanging arm 2.carrying the needlebar 3 with needle 4, the primary prcsser-foot 5 andfeeding presser-foot 6. The bed-plate is offset at the right of thefeed-line to form a depression in which is secured by means of fasteningscrews 7 the attachment base-plate 8 which is provided at its forwardend with a steady-pin 9 having a disk washer 10 intermediate which andthe head of such pin is interposed the spring 11, and is provided atitsrear end with a pair of upturned lips '12,provided with transversenotches 13 to receive projecting tongues 14 of the flat foot-piece 15having at its forward end a longitudinal slot 16' embracing saidsteady-piir beneath the upwardly yielding washer 10 and flared at itsforward end to admit the fixed stud 17 upon the base-plate 8.

The tubular binding guide 18 is of the usual 11'- shape, and is attachedto the upturnedflange 19 of the foot-piece 15; It is provided along itsedges with U- shaped edge-turning channels 20 and terminates at itsforward or delivery end in an acute angle where it is provided withguide-hooks 21 to prevent the spreading of the binding strip whenreversed for delivery crosswise of the attachment through the end of thecentral opening intermediate thebinding channels.

As represented in Figs. 1' to 4 inclusive, the arched inner convex bodyportion or" the guide extends rearwardly at 22 slightly beyond the outerconcave portion,-

and merges into a substantially fiat backwardly-inclined portion 23terminating in a cylindrical portion at24; and the rearward end of theportion 22 is spanned by a bridge-piece 25 conforming therewith inshapeand serving as a guard to confine the material upon the flattenedportion 23. f

The uncurling device comprises a yoke-member 26 having substantiallyparallel -sides pivoted to and embracing the outer extremity of theguide 18and. having an intermediate curved operative portion formed withouter and inner edges 27 and 28 which are respectively convex andconcave, a transverse guide bar 29 being secured within taid yoke-memberbetween its curved operative portion and the end of the bind- 1 "side bymeans of a thumb-screw 31, whereby it may be clamped in any suitableposition of adjustment inrelation to the binding guide.

The method of using the device'is as'followsz 'lfhe attachment is firstadjusted in position by introducing the forward portion of its-foot-piece 15 beneath the yielding washer '10 and pressed forwardwithin the.

' channel intermediate the upturned lips 12 until its lateral tongues 14are enabled to enter the notches 13,"

by which the attachment is securely located in operative position withthe longitudinal opening inter-i 1 mediate its binding channelssubstantially at the level of the raised portion of the sewing machinebed-plate,

as represented in Fig. 1. The binding tape a, which is ordinarily madewith raw edges, is then led from the reel, upon which it is commonlywound, from some suitable position upon. or near the sewing machine,

first over the convex edge 27, then over the concave edge 28 and underthe guide-hm 29 upon the inner member of the binder across the parts 24and 23 and the part 22 or. the edges of which the corrcspo' 7 ingportions oi the binding strip enter the edge-turning channels by meansof which they are turned. to form the selvage upon the binding apreparatory to stitching it to the fabric 12 as shown in Figs. 1 and Thenotion of the convex edge 27 is to enter the tubular space embraced bythe natural curl of lhe binding strip, and that of the concave edge 28is to mini in the central portion oi the binding distended, while-theent r portions oi the latter serve to take up the slack 'svh'lch wouldotherwise he left by reason of the curveof the uncurling edge 27. Thefunction of the cross-czar 29 is to maintain thestrip taut in itspassage frozn the yoke-member 26 to the mouth of the binder, Li-'llilethe peculiar shape of the adjacent portion of the binder is designed toinsure the entrance into the lotof e binding strip fully distended whileproscntconformity with the shape of the binding ire will he ohsewed, theedges of the strip Jrned over by the uncurling device in a reversedirection from that which it originally assumed, and ..."es are stillfurther turned in the same directhe edge-turning channels of the bindingguide, in order that their elasticity may serve to mainmil lshenl incontact throng n ut with the walls of such channel and in conformitytherewith.

simplified iorrn ol the atta.(,:l1ment represented in Figs. 6 end 7, issimilar 1 general constructive feeto that represented in the-precedingfigures, hut '5 tllerelrozn in the omission of the bridge-piece nd thelistened bnckwsi ly-inclined portion 1.3 of inner member of the bindingguide; the arched ion 22 merging directly into the cylindrical end r rismernhor. For isorics of hig ly elastic charr, ithes been found in"pr-act e desirzrhle to form reerw-cu-d end of the inner neznber of theguide wi all l abrupt curve or. the junction of th poras represented inF 3, in order that rip through the ottocluncnt and over P lol luv 1 e ltll nd to readily enter in proper condition the non i" r simplified hinlin '-guide represented o, whic 1 has the advantage, not only of siniofform out. of opposing less resistance to the in than the lorrn r.

strip-folding gu de shownund described herein is formed with a guidingchannel which is slightly its receiving .1d and merges atits deliv .zUa; will oe observed that the uncurling; yoke 2b is in at 'ons disposedtransversely of the deliver 'olvots I is the overlying inenihers of thechemo el at the delivery end. ol the rule. lt will he observed l at theyok 2 .3 crosses oi" rntersects'the medial plane of the guiding channelintermediate and substantially parallel with the overl ing members ofthe letter at its delivery end,

and therefore maintains a position in advance or in front of thereceiving end of the strip'guidingchannel, thus avoiding any abruptbends or sharp angles in the strip in its passage to the guide, so as toinsure against any unnecessary distention oi the elastic material.

which W ould impair the ultimate condition of the Work by contractionalter the lOldlHfl and-stitching operations, the object ol the presentimprovement being to apply the strip to the margin oi the hodyfahricwith as little distortion possible, consistent with the proper controlof the some in presenting it for the stitching operation.

Although the present improvement isshown in the accompanying drawings asembodied in a sewing niochine strip folding device tor hindjng the edges01' articles of knit-goods, it is evident that the some is readilyadapted for other conditions involving the handling ol strips of elasticmaterial, as in Winding upon supply reels the strips of such fabric whenoriginally cut from the larger sheets preparatory to its use inconnection I 1: serving machine, as before den lhed.

rile the present improvement is illustrated in. the companying drawingsin tw of its approved lornis, it will be readily understood that thedevice is susceptible ol' considerable modification without depart orefrom the spirit of the invention, the essential feature of which is theprovision of the spaced convex.

portion disposed slightly below the raised work-plate,

in order to present the lower portion of the binding in proper relationto the under side or the fabric 5), but that the lateral tongues 14, inconjunction with the notches 13 in the upturned lips 32, not as atransverse pivotal connection with the sewing machine bed lor preventingeudwise and sidewise disp'm out 01' thereceiving' end of the guide Whilepermitting the upward yield ol the delivery end in opposition to thespring 1]. so as to enable the attachment to accommodate itsoll to (rss-scmns in the fabric to he stitched or to permit .rhng; to be drawnthrough the some by hand without excessive resistance when required,preparatory to starting; a binding operation.

Having time set lorth the nature of the invention, what I claim her1s 1. The COl1ll lI121llOD with u strip-folding guide comprising :1channel formed at its delivery end with spaced overmembers, 01' onuncurliuy, device provided with a paced rclzri' 'cly convex and concaveopera- .iiod successively, in the order named. to rrzmged in advance ofand in angular relzr 1 lo the delivery end of said guide andintersecting the ill gala-Inc oi the guiding channel.

P combination with :1 str .yulde, of an uncurling provided with aplurality of spaced relatively conedn'cs liz'rvlng heir end portionscurved Into pnrnl planes at the extreme edges of the .1111 Hid present0. successively, in the order nouxod. to the nlolc'ial in advance of themouth of the guide.

member for engagement .with the material entering the l difierentangular adjustments in relation to the receiving guide, of an uncurlingdevice provided with a plurality of spaced relatively convex and concaveedges presented successively, in the order named, to the material in advnnce'of said transverse member of the guide.

4. The combination with a strip-guide terminating at its mouth orreceiving end in acylindrical transverse member for engagement with thematerial entering the guide, of an uncurling device provided with aplurality of spaced relatively convex and concave edges presentedsuccessively, in the order named, to the material in advance of saidtransverse member of the guide, and a transverse straightslack-controlling rod interposed between said transverse member and theconcave stripengaging edge, but offset from a direct line between thesame and toward the plane of said convex strip-engaging edge.

5, The combination with a sewing machine binding guide having an archedinner member terminating at its receiving end in a transversecylindrical portion into which the arched portion merges, of anuncurling device provided with a plurality of spaced relatively convexand concave edges presented successively, in the order named, to thematerial in advance of said transverse cylindrical portion of the guide.

6. The combination with a strip-folding guide comprising a channelformed at its delivery end with spaced overlying members, of anuncurling device comprising a yoke-member consisting of a curved barhaving relatively convex and-concaveopposite edges adapted for wecessive engagement of the material entering the guide, and a pivotalconnection intermediate said yoke-member and guide having its axisdisposed transversely of the delivery end of said guide, whereby saidyoke-member is adapted to be set at dliiferent angles in respect of thereceiving end 'of said guide,

7. The combination with a strip-folding guide comprising a channelformed at its delivery end with spaced overlying members, of anuucurling device comprising a yokemember consisting of a curved barhaving relatively convex and concave opposite edges adapted forsuccessive engagement of the material entering the guide, and a pivotalend of the guide.

8. A strip-guide comprising a base-plate with means for securing it upona suitable support and provided upon its upper face with a channelhaving parallel edges and lateral notches, and a tubular guide memberprovided with a foot-piece having parallel edges adapted to fit saidchannel of the base-plate and transverse tongues to enter the lateralnotches of said channel, and means for detachably securing saidfoot-piece yieldingly seated upon the base-plate.

9. A strip-guide comprising a.base-p1ate with means for securing it upona suitable support and having at one end a steady-pin and a washersurrounding the same and a spring for maintaining said washer seatedyieldingly upon said plate, and having at its opposite end a pair of parallel-guide-lips with transverse notches, and a tubular guide memberprovided with a foot-piece having at one end a longitudinal slot toembrace said steady-pin be neath its surrounding washer, and at theother end lateral tongues to enter the transverse notches in saidguidc-lipa 10. The combination with a sewing machine bed comprising araised workplate, of a binding guide having one edge of its delivery endnormally disposed slightly below the level of said work plate, and afoot by which said guide is sustained having its receiving end connectedwith the sewing machine frame by a pivotal joint to confine it fromendwise and sidewise movement while permitting vertical movement andhaving at its delivery end means for yieldingly maintaining it in normalposition while permitting it to yield vertically inrespect of said woricplate.

11. The combination with a strip-guide, of an uncurling device providedwith a plurality of spaced relatively convex and concave edges presentedsuccessively, in the order named, to the strip, and a straighttransverse slackcontrolling rod interposed between said uncurling deviceand the mouth at said guide.

In testimony whereof, I have signedmy name to this specification, in thepresence of two subscribing witnesses.

, ALBERT HARRISON DE VOE,

Witnesses:

HENRY J. MILLER, HENRY A. KonuniuANN.

